Table 1.

Zirconium compounds-catalyzed esterification of acrylic acid 1a with methanol 2a^a

(a) The reactions were carried out using 5 mmol of 1a, 5 mmol of 2a and 0.025 mmol of ZrOCl₂·8H₂O at r.t. for 24h. (b) The reused catalyst.